Leases and Commitments - Maturity of Lease Liability (Details) - USD ($) $ in Millions	Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
2020	$ 59.7
2021	50.5
2022	42.4
2023	28.3
2024	20.2
Thereafter	30.1
Total lease payments	231.2
Less: Interest	42.2
Present value of lease liabilities	189.0
Finance Lease, Liability, Payment, Due [Abstract]
2020	1.2
2021	0.9
2022	0.6
2023	0.1
2024	0.0
Thereafter	0.0
Total lease payments	2.8
Less: Interest	0.4
Present value of lease liabilities	2.4		$ 0.0
Lease Liabilities, Payments Due [Abstract]
2020	60.9
2021	51.4
2022	43.0
2023	28.4
2024	20.2
Thereafter	30.1
Total lease payments	234.0
Less: Interest	42.6
Present value of lease liabilities	$ 191.4	$ 204.3